Hydraulic press



Sept. 4, 1923. l l.. D. WHITNEY HYDRAULIC PRESS Filed Aug. 28, 1922 2Sheets-Sheet Y1l Epl Sept. 4, i923. 1,467,130

L.. D. WHITNEY HYDRAULIC PRESS Filed-Aug. 2g, 1922 2 sheets-snaai 2 irli z M93. i

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Patented Sept. 4, 1923.

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HYDRAULIC runes.

Application led August 28, 1922.

To all whom it may concern:

Be it known that I, LESLIE D. IHITNEY, a citizen ot' the United States,residing at the city and county lof San Francisco and State ofCalifornia, have invented certain new and useful Improvements inHydraulic Presses, of which the lfollowing is a speciication.

My invention relates to the class of hydraulic presses especiallyadapted for compressing granular or finely divided material, such, forexample, as common salt, into small, hard cakes. y

The object of my V invention is to provide an apparatus ofthe describedclass which is simple in construction and' rapid and etlicient inoperation. To this end I employ a plurality of molds, so mounted as tobe successively 'brought into the spheres of action first of thecompressing mechanism, and

then of the ejecting mechanism, said com-` pressing and ejectingmechanisms operating simultaneously upon successive molds.

My invention will now be fully described with reference totheaccompanyi'ng drawings, wherein.-v

Fig.l 1 is a side elevation of my press, the,

Huid connections and control valve being omitted. Fig. 2 is a plan viewof the sam'e.

Fig. 3 is a vertical section taken on the line 3 3 of Fig. 2, showingthe iiuid connections and controlling. means.

Fig. 4 is a sectional plan view taken on the line 4-4 of Fig. 1.

In the drawings, the reference numeral 1 designates a base, from whichrise a pair. of fixed supporting columns 2 and 2 carrying a fixed head3. This head has formed within it a fluid pressure cylinder 4, closed atthe top and open at the bottom.y A piston Fig. 3 operates verticallywithin said cylinder 4, and projects from its lower end through asuitable packing gland 6. Said piston carries a cross head 7, to which1s secured the upper or compressing die 8. The fixed head 3 also carriesa second fluid pressure cylinder 9, above and preferably in verticalalignment with the cylinder4. Said second or upper cylinder is smalle-rin diameter than-the cylinder 4, and is inverted, being closed A at itsbottom. A piston l0 yoperates in the vupper cylinder f9, projecting fromits upper end through a packing 'gland 11. A cross head 12, Fig. 1,securedto said piston' 10, carries two depending rods v13,

lSerial No. 584,653.

which slide freely in guide bearings 14 in the iXed head 3, and aresecured at their lower ends to :the cross head 7, as lshown at 15. Thepistons 5 and 10 are thus connected together, and move in unison.

' Fluid, under suitable'pressure is admitted continuously to the upperthrough a connecting pipe 16, F ig.'3i, vfrom a suitable source, notsho-wn, and normally maintains the upper die 8` inv a position abovethat shown in the drawings. When the uid, Jfrom the .same source, lisadmitted to the lower cylinder 4 throughV a connection 17, and athree-way valve 18 the die 8 is forced downward into the positionsho-wn, byreason of the vdiii'erence in effective area of the twopistons 5 and 10; and when the pressure is relieved in the lower.cylinder 4, by turning said valve 18 so that the supply vis out oli andthe iiuid in Asaid cylinder 4 is allowed to escape through the dischargeoutlet 19, the die Y8 isY again elevated bythe pressure inthe. uppercylinder 9. lThus the movement of said die 8 is controlled entirely -bythe single valve 18. It should be understood, however, that thethree-way valve 18 is herewith illustra-ted merely as a preferred meansVfor controlling `the movement of the die 8, and that any other similaror equivalent means for controlling the admission ,ofV the Huid to andits discharge from the ycylinder 4 may be employed. y

The vmold in which the cakes are formed `comprises a cylindricalbushing-20 carried ina horizontal rotatable member or turret 21.Thereare preferably `tour such molds ,in said turret, as shown in Fig.4, but more or less maybe used-as desired. The turret 21 is rotatablymounted upon the' liXed column 2f, and,i n the presentinsta'nce, isintended to be rotated manually to bring 4the molds 2O successively inalignment "with the die 8. Athrust collar E22, Fig. 3, is secured tothecolumn 2 above'the uturret.2`l,`and

said turret is normally pressed upward,

against'said collar, by a spring-'23, which allows the turretv to give,in va ,downward direction, in case ift-is not properly positioned whenthe die 8 descends.

A spider 24 is secured beneath the turret 2l and rotates therewith. Saidspider 'car`- ries spindles 25, yuponthe 'upper ends of which are formedor 'securedthelower yor resistingdi'es 26. There is one such 'spindleand die for each mold Q0, the die znormally occupying a position withinthe leiter pi-,

cylinder 9 tion of the mold, as shown at the left in Fig. 3. Thespindles 25 are vertically slidable in the spider 24, and are held intheir normal position by springs 27 and thrust collars 28. A fixed restor 'foot 29 is mounted in the base l, upon which the lower end of eachspindle 25 rests when said spindle is in vertical alignment with theupper die 8, so that the thrust is taken by the base l rather than bythe spider 24.

The slidable spindles 25 are employed to eject the formed cakes from themolds. For this purpose there is provided a biturcated lever 30, Figs. 3and 4, fulcrumed at 31 upon the base 1, and having one end connected bya pair of links 32 with the movable cross head 7 of the upper die 8. Theother end of said lever 30 carries a. roller 33, which is positionedbeneath the lower end of the spindle 25 which is diametrically oppositeto the spindle aligned with the upper die 8, as shown in Fig. l and atthe right in Fig. 3. Thus when the compressing die 8 moves down, tocompress the cake within the mold 20 at the position B in Figs. and 4,the lever 30 causes the opposite spindle 25 to be elevated, as shown,thereby ejecting the formed cake from the mold 2O at the position C.

In the operation of the machine, the uncompressed material is placed inthe mold 2O at the position A, Fig. 4, by hand or otherwise, and theturret 2l is rotated to bring the mold thus charged to the position Bbeneath the upper or compressing die 8. The valve 18, Fig. 3, is thenturned to the position shown, to admit iiuid to the lower cylinder 4,thereby forcing said die 8 downwardly and compressing the material,after which said valve is turned to permit the discharge of th'e fluidfrom said cylinder 4, allowing said die 8 to be elevated by the upperpiston l0. In the meantime, a fresh charge of material has been placedin the following mold 20 at the position A. The turret 2l is thenrotated a quarter turn, and the operation repeated. When the first mold20 with the formed cake therein reaches the position C, the operation ofthe compressing die 8 at B elevates the spindle 25 at C, as shown inFig. 3, thereby causing its resisting die 26 to eject the previouslycompressed cake from the mold.

I claim 1. A press comprising a xed support; a rotatable member mountedthereon and provided with a mold; a reciprocative compressing diecoacting with said mold from one side as the same is brought intoregistry therewith by the rotation of said member; a reciprocativeresisting die carried by said rotatable member and adapted to coact withsaid mold from the other side; a fixed mem` ber carried by said supportfor holding said resisting die in functional compressing positionrelatively to said mold when the latter is in registry with thecompressing die; and means for moving said resisting die to eject apreviously compressed mold content when said mold is outl of registrywith the compressing die.

2. A press comprising a tiXed support, a rotatable member mountedthereon and having a plurality of molds; a reciprocative compressing diecoacting with said molds from one side as each is brought, by therotation or said member, into registry successively therewith; aplurality of reciprocative resisting dies carried by said rotatablemember, each coacting with its respective mold from the other side; afixed member mounted on said support for holding said resisting dies infunctional compressing position relatively to their molds when saidmolds are in registry with the compressing die; and means for movingsaid resisting dies when their molds are out of registry with saidcompression die, to eject a previously compressed content.

3. A press comprising a resiliently mounted rotatable member having aplurality of molds; a compressing die coacting with said molds from oneside as each is brought, by the rotation of said member into registrysuccessively therewith; means for reciprocating said compressing die; aplurality of reciprocative spindles carried by said rotatable member; adie carried by each spindle coacting-with the molds from the other side;means independent of said rotatable member for acting on said spindlesto hold their dies fixed in their molds when in registry with thecompressing die; means acting on said spindles when their dies are outof registry with the compressing die to move said spindles and theirdies to eject a previously compressed mold content; and connectionsbetween the reciprocating means of the compressing die, and the ejectingmeans of the resisting dies to operate the latter upon the compressingmovement of the former.

4. A press comprising a rotatable member having a plurality of molds; acompressing die coacting with said molds from one side as they arebrought successively into registry therewith, a reciprocative membercarrying said compressing die; a plurality of reciprocative spindlescarried by said rotatable member, each having a resisting die coactingwith the respective molds from the other side; a iXed bearing 'acting onsaid spindles to hold their dies in iiXed position in the molds when inregistry with the compressing die, a pivotedv lever bearing at one endunder the spindles when their dies are out of registry with thecompressing die, and adapted to move said dies to eject a previouslycompressed mold content; and rods directly connecting the other end ofsaid lever with the reciprocative member 0r the compressing die, andadapted to operate said lever for its ejecting Jfunction upon thecompression movement of said compressing die.

5. A press comprising a rotatable resiliently mounted turret having aplurality of molds; a reciprocative piston carrying a compressing dieadapted to coact with said molds from one side. as each is brought intoregistry therewith; a spider carried by said turret; a plurality ofspindles resiliently slidable in said spider, each spindle having aresisting die coacting With a respective mold from the other side; afixed bearing acting on said spindles to hold their dies in 15previously compressed mold content; and 20` connections with theoperating piston of the compressing die to operate the lever for its ejecting function upon the compressing movement of said piston.

In testimony whereof I have signed my 25 name to this specification.

LESLIE D. WHITNEY.

